JPH0749254A - Liquefied gas cylinder residual quantity indicator and draught bear residual feed quantity indicator - Google Patents

Abstract

PURPOSE:To enable correct judgment on the residual quantity by setting saturated gas pressure in the case of liquefied gas in a gas cylinder being almost entirely gasified under the set operating outside air temperature, as the almost maximum graduation of a graduation part. CONSTITUTION:The casing 11 of a pressure detecting part 10 is connected to the gas passage of a gas cylinder by a male screw 12. A pressure receiving piston 15 moves into a position where the pressure of the gas led into a cylinder chamber 13 antagonizes the spring force of a spring 18. The strength of the spring 18 is adjusted by moving a pressure regulating lid 17. The moving quantity of the piston 15 is so set that the piston 15 does not move further due to the contact of a seat 26 with the inner wall of the casing 11 when the gas pressure on the cylinder side becomes the set gas pressure. This set gas pressure is set to be approximately equal to the saturated gas pressure at the time of liquefied gas in the gas cylinder being entirely gasified. That is, the residual gas at the entirely gasified time of the liquefied gas is set as the maximum graduation, and the residual gas quantity below that is converted and displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquefied gas cylinder residual amount indicator and a draft beer residual pouring amount indicator.

[0002]

^2. Description of the Related Art In a draft beer server, a liquefied carbon dioxide gas cylinder is connected to a beer barrel, and draft beer is pushed out by a gas whose pressure is reduced to a set supply pressure (about 1.0 to 3.5 Kg / cm ² ) through a pressure reducing valve. Gas cylinders require a replacement gas cylinder to be ordered before the gas runs out,
Generally, attach a pressure gauge that detects gas pressure to the primary side of the pressure reducing valve, and order when the gas pressure drops below the set pressure,
And I try to replace it with a new cylinder. A Bourdon tube type pressure gauge is generally used as the pressure gauge.

[0003]

However, the saturated gas pressure of the liquefied gas varies greatly depending on the ambient temperature. For example, in the case of liquefied carbon dioxide gas, the saturated vapor pressure is 70 kg / cm ² or more when the outside temperature in summer is high at 30 ° C when the tank is full, and the pressure that is gasified by being heated by direct sunlight during transportation and outside of the cylinder is It shows a high pressure of 120 kg / cm ^2, but when the outside temperature in winter is as low as −5 ° C., even if the tank is full, it only shows a pressure of about 30 kg / cm ² , and the user can replace it even if it is replaced. There is a possibility that you may be worried about whether it is a tongue cylinder. In other words, the scale of the pressure gauge indicates that the safety zone is green, the caution zone is yellow, and the danger zone is red when it is time to replace, but the pressure zone of about 30 kg / cm ² is the red zone. Because it becomes an area. Also, in normal use, it is convenient not only to indicate the caution area and danger area of cylinder replacement but also to know how much beer pouring amount remains. However, simply displaying the pressure of the cylinder cannot determine the pouring amount at all because the remaining amount varies depending on the property of the liquefied gas and the size of the cylinder. In the past, due to the size of the cylinder used by ourselves, we only empirically judge the remaining amount based on the pressure, which is extremely inaccurate. There was an inconvenience.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to display a remaining amount indicator of a liquefied gas cylinder and an indicator of the residual pouring amount of draft beer that can accurately determine the remaining amount. To provide.

[0005]

The present invention has the following constitution in order to achieve the above object. That is, it has a detection unit for detecting the gas pressure in the gas cylinder, and in order to display the gas pressure detected by the detection unit by converting it into the remaining amount of gas, the scale and the pointer with the remaining amount are displayed. In the remaining amount indicator of the liquefied gas cylinder that has, the saturated gas pressure when almost all the liquefied gas in the gas cylinder has been gasified at the set ambient temperature, is set to almost the maximum scale of the scale part, and the maximum scale to the minimum scale. It is characterized in that the scale between the intervals is displayed on the scale for indicating the remaining amount of gas. In order to be commonly used for gas cylinders having different capacities, it is preferable to display the scale portion in a plurality of stages for each capacity of the gas cylinders. It is also possible to display the scale of the scale portion by the converted effective gas remaining amount under the secondary side set supply pressure of the gas supplied through the pressure reducing valve. The detection unit includes a pressure receiving piston that receives the gas pressure of the gas cylinder and a spring provided behind the pressure receiving piston, and the pressure receiving piston that receives the gas pressure until the liquefied gas in the gas cylinder is almost completely liquefied. It is preferable to provide a stopper that stops the movement. Further, in the present invention, a scale and a pointer are provided in order to display a residual pouring amount of draft beer converted by the gas pressure detected by the detection unit, which has a detection unit for detecting the gas pressure in the liquefied carbon dioxide gas cylinder. In the indicator for the remaining amount of draft beer to have, the saturated gas pressure when almost all the liquefied carbon dioxide in the gas cylinder is gasified at the set ambient temperature is set to almost the maximum scale of the scale part, and the maximum scale is set to the minimum. It is characterized in that the scale between the scales is displayed by the residual pouring amount of draft beer allocated by the converted effective gas remaining amount under the secondary side set supply pressure of the gas supplied through the pressure reducing valve.

[0006]

According to the present invention, it is used to display the remaining amount of carbon dioxide gas or other liquefied gas, and the remaining gas amount when the liquefied gas is completely gasified is used as the maximum scale, and the remaining gas amount is converted and displayed below. Therefore, the remaining gas in the range where the remaining amount is small can be displayed accurately and clearly. Especially when supplying gas that has been depressurized to a set pressure via a pressure reducing valve, such as when supplying to a beer barrel of draft beer, the scale of the scale part is supplied via the pressure reducing valve to the secondary side set supply of gas. By displaying the effective remaining amount of gas converted to pressure (= remaining draft amount of draft beer), it is convenient to know the remaining amount during actual use.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a sectional view of the pressure detection unit 10,
FIG. 2 shows a front view. Reference numeral 11 denotes a casing, which has a male screw 12 formed on one end side and is attached to, for example, the primary side of the pressure reducing valve so as to be connected to a gas flow path of a gas cylinder (not shown). 13 is a male screw 1 of the casing 11.
It is a cylinder chamber formed at the end on the second side, and communicates with the gas flow path of the gas cylinder through the through hole 14. A pressure receiving piston 15 is slidably fitted in the cylinder chamber 13. 16 is a seal ring. Pressure receiving piston 1 of casing 11
5, a pressure adjusting lid 17 is screwed onto the wall surface facing the valve 5, and the spring 1 is interposed between the pressure adjusting lid 17 and the pressure receiving piston 15.
8 is interposed. Therefore, the pressure of the gas introduced into the cylinder chamber 13 of the pressure receiving piston 15 is equal to that of the spring 1
It is possible to move to a position that opposes the resilience of 8. The strength of the spring 18 can be adjusted by moving the pressure adjusting lid 17.

A rack 20 is formed in the middle of the peripheral surface of the pressure receiving piston 15. Reference numeral 21 is a pinion that meshes with the rack 20, and a rotary shaft 24 of which is rotatably inserted through and supported by a bearing 23 provided on a scale plate (scale portion) 22. 25 is a guide pin, which is the casing 11
Is screwed so that the tip projects from the outside into the cylinder chamber 13, and the tip fits into a guide groove (not shown) axially provided on the circumferential surface of the pressure receiving piston 15 to move the pressure receiving piston 15 in the axial direction. Is movable and prevents rotation about its axis. The rotation of the pressure receiving piston 15 about the axis is prevented by the rack 20 and the pinion 21.
This is to ensure the engagement with. As for the moving amount of the pressure receiving piston 15, the gas pressure on the cylinder side (primary side) is the set gas pressure,
For example, when the pressure reaches 30 kg / cm ² , the seat 26 of the pressure receiving piston 15 that receives the spring 18 comes into contact with the inner wall of the casing 11 and does not move any further. Although the seat 26 and the like constitute a stopper, an appropriate stopper mechanism may be separately provided.

The set gas pressure is set to be substantially equal to the saturated gas pressure when the liquefied gas in the gas cylinder is completely liquefied at the set ambient temperature of the gas cylinder. The liquefied gas is, for example, carbon dioxide, and the gas temperature is -5 ° C.
In this case, the saturated gas pressure is about 30 kg / cm ² . Even when used indoors in winter, the minimum outside temperature (room temperature) is -5 ° C.
Since it is considered to be a degree, in the embodiment, the set outside temperature is −
The temperature was set to 5 ° C. and the set gas pressure was set to 30 kg / cm ² . The setting gas pressure can be adjusted by the pressure adjusting lid 17. A pointer 27 is fixed to the tip of the rotary shaft 24. The scale plate 22 is provided with a scale 28 that is displayed as a converted effective gas remaining amount (= draft beer residual pouring amount) under a set supply pressure on the secondary side that is decompressed via a pressure reducing valve. The pointer 27 indicates the zero position of the scale when the gas pressure is zero, and the gas pressure is 3
It is designed to indicate the maximum position of the scale 28 when the pressure is 0 kg / cm ² or more. FIG. 3 shows an example of the scale 28 of the scale plate 22. The scale 28 has a gas cylinder of 10 kg, 7
It is provided so as to correspond to three kinds of sizes of Kg and 5 Kg, and is arranged concentrically. The outside is for 10 kg, the middle is for 7 kg, and the inside is for 5 kg. 10 kg,
Since the gas cylinders for 7 kg and 5 kg have different capacities, the remaining gas amount is different even if the gas pressure is the same. Table 1
Shows a conversion table of gas pressure and residual gas.

[0010]

[Table 1]

[0011] In Table 1, the unusable gas amount refers to the remaining amount of gas that cannot effectively pour draft beer in the case of draft beer. The set supply gas pressure of draft beer into the beer barrel is generally reduced to about 3.3 Kg / cm ² or less, and if it is converted to 3.3 Kg / cm ² , the set supply gas pressure will be less than that. In this example, the remaining gas amount was 3.3 Kg / cm ² because there is a margin even when the gas pressure is used. Since the atmospheric pressure is about 1 kg / cm ² , the amount of unusable gas in the cylinder is 10 kg.
If the average volume of the cylinder is 13.4 liters, 13.
4 × 4.3 = 58 (liter). Therefore, the remaining amount of effective gas in the cylinder is 13.4 at 30 Kg / cm ^2.
It becomes x31-58 = 357 (liter). How much draft beer can be pushed out (the remaining draft amount of draft beer = the remaining amount of effective gas at the set supply pressure of 3.3 Kg / cm ² ) is 357 ÷
It becomes 4.3 = 83 (liter). It is converted in the same manner below. As is clear from Table 1, it is understood that the gas residual amount is different even with the same gas pressure. The residual pouring amount of draft beer on the scale 28 is displayed in an easy-to-understand numerical value of 20 liters and 40 liters (the corresponding gas pressure is calculated by the inverse calculation to the above, and the scale is displayed at the position of the gas pressure).

By setting the scale 28 as described above, when the gas cylinder has just been replaced and the amount of gas is sufficient and a liquefied portion is included, the pressure receiving piston 15 is pushed to the maximum and stopped by the stopper. Since there,
It is understood that the pointer 27 is swung to the maximum scale position and stopped at this position until the liquefied gas is completely liquefied. Since this graduation range is a safety area, it is advisable to display the corresponding graduation 28 portion in a safety color such as green. When the liquefied gas is completely gasified and the gas is further consumed, the pointer 27 starts moving. In this case, the user can see at a glance the scale 28 that the remaining amount of effective gas under the set supply pressure on the secondary side, that is, how much draft beer can be poured out, so that the user's daily usage amount, etc. With this in mind, you can immediately know when to order the replacement cylinder.

In the above embodiment, the effective gas remaining amount under the set supply pressure on the secondary side, which is decompressed by the pressure reducing valve, is converted and displayed on the scale. However, when it is released into the atmosphere and used, it is displayed at atmospheric pressure. The converted gas amount may be displayed on the scale 28. Further, in the above embodiment, the scale plate 22 is fixed and the pointer 27 is moved, but the pointer 27 may be fixed and the scale plate 22 may be rotated. The graduation plate 22 is not necessarily a flat plate, and graduations may be provided on a cylindrical peripheral surface so that the graduation plate 22 can be fixed or rotated to indicate the remaining amount with the pointer 27. In addition, the pointer 27 is a concept including a marked line and other indexes. The liquefied gas is not limited to carbon dioxide gas and can be suitably used for other liquefied gases. Further, the application is not limited to draft beer, and of course, it can be used for various gas appliances.

Although the present invention has been variously described with reference to the preferred embodiments, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. Of course.

[0015]

According to the present invention, carbon dioxide gas or other liquefied gas is displayed as a residual amount, and the residual gas amount when all the liquefied gas is gasified is used as the maximum scale. By doing so, it is possible to accurately and clearly display the remaining gas in the range where the remaining amount is small. Especially when supplying a gas whose pressure has been reduced to a set pressure via a pressure reducing valve, such as when draft beer is supplied to a beer barrel, the scale on the scale is set to the secondary side set supply pressure of the gas supplied via the pressure reducing valve. It is convenient to know the remaining amount during actual use by displaying the effective remaining amount of gas (= remaining draft amount of draft beer) converted in.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a gas level indicator.

FIG. 2 is a front view of the gas level indicator.

FIG. 3 is an explanatory diagram showing a scale portion.

[Explanation of symbols]

 10 Pressure Detection Section 13 Cylinder Chamber 14 Through Hole 15 Pressure Receiving Piston 18 Spring 20 Rack 21 Pinion 22 Scale Plate (Scale Section) 25 Guide Pin (Stopper) 27 Pointer 28 Scale

Claims (5)

[Claims] 1. A scale part having a detector for detecting the gas pressure in a gas cylinder, and displaying the remaining amount so as to convert the gas pressure detected by the detector into the remaining amount of the gas to be displayed. In the residual gas indicator of the liquefied gas cylinder that has a guideline and a guideline, set the saturated gas pressure when almost all the liquefied gas in the gas cylinder has been gasified at the set ambient temperature, and set the maximum scale of the scale to the maximum scale. The remaining amount indicator of the liquefied gas cylinder is characterized in that the scale between the minimum scale and the minimum scale is displayed on the gas residual amount display scale. 2. The remaining amount indicator of a liquefied gas cylinder according to claim 1, wherein the scale portion is displayed in a plurality of stages for each capacity of the gas cylinder so as to be commonly used for gas cylinders having different capacities. 3. The liquefaction according to claim 1 or 2, wherein the scale of the scale portion is displayed as a converted effective gas remaining amount under a secondary side set supply pressure of gas supplied through a pressure reducing valve. Gas cylinder fuel gauge. 4. The detection unit includes a pressure receiving piston that receives the gas pressure of the gas cylinder, and a spring provided behind the pressure receiving piston, and receives the gas pressure until almost all the liquefied gas in the gas cylinder is liquefied. The remaining amount indicator of the liquefied gas cylinder according to claim 1, 2 or 3, further comprising a stopper for stopping the movement of the pressure receiving piston. 5. A scale and a pointer are provided to have a detector for detecting the gas pressure in the liquefied carbon dioxide gas cylinder, and to display the remaining amount of draft beer converted by the gas pressure detected by the detector. In the indicator for the remaining amount of draft beer that the company has, set the saturated gas pressure when almost all the liquefied carbon dioxide in the gas cylinder has been gasified at the set ambient temperature, and set the maximum scale of the scale to the minimum scale. Draft beer residual pouring amount display, characterized in that the scale between the scales is displayed with the residual pouring amount of draft beer allocated by the converted effective gas residual amount under the secondary side set supply pressure of the gas supplied via the pressure reducing valve. Total.